<!DOCTYPE html>
<html>
<meta charset="UTF-8">
<!-- 引入 Bootstrap -->
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<title>演示租户</title>
<body>
    <header>

    </header>
    <nav>
        <div>
            
        </div>
    </nav>
    <footer>

    </footer>
</body>